[dev.ssa] cmd/compile: use Copy instead of ConvNop
The existing backend simply elides OCONVNOP.
There's no reason for us to do any differently.
Rather than insert ConvNops and then rewrite them
away, stop creating them in the first place.
Change-Id: I4bcbe2229fcebd189ae18df24f2c612feb6e215e
Reviewed-on: https://go-review.googlesource.com/12810
Reviewed-by: Keith Randall <khr@golang.org>
diff --git a/src/cmd/compile/internal/ssa/gen/genericOps.go b/src/cmd/compile/internal/ssa/gen/genericOps.go
index bc1fdc8..7536415 100644
--- a/src/cmd/compile/internal/ssa/gen/genericOps.go
+++ b/src/cmd/compile/internal/ssa/gen/genericOps.go
@@ -203,7 +203,7 @@
{name: "ClosureCall"}, // arg0=code pointer, arg1=context ptr, arg2=memory. Returns memory.
{name: "StaticCall"}, // call function aux.(*gc.Sym), arg0=memory. Returns memory.
- // Conversions: signed extensions, zero (unsigned) extensions, truncations, and no-op (type only)
+ // Conversions: signed extensions, zero (unsigned) extensions, truncations
{name: "SignExt8to16"},
{name: "SignExt8to32"},
{name: "SignExt8to64"},
@@ -223,8 +223,6 @@
{name: "Trunc64to16"},
{name: "Trunc64to32"},
- {name: "ConvNop"},
-
// Automatically inserted safety checks
{name: "IsNonNil"}, // arg0 != nil
{name: "IsInBounds"}, // 0 <= arg0 < arg1
